Automatically-controlled valve mechanism for gas-burners.



No. 789,429. PATENTED MAY 9, 1905. G. JACOBS & P. ZIGANEK.

AUTOMATICALLY CONTROLLED VALVE MECHANISM FOR GAS BURNERS.

APPLICATION FILED NOV. 21, 1904.

WI TNESSES:

iygw 1 *EM 5% no. mates.

Patented May 9, wet.

ATENT FIFE ZIG-ANEK ASSIGNOR TO SAID J AOOBS.

AUTOMATICALLY-CONTROLLED VALVE MECHANISM FOR GAS-BURNERS.

SPECIFICATION forming part of Letters Patent No. 789,429, dated May 9, 1905.

Application filed November 21, 1904. Serial No. 233,651.

To a. whom/ it may concern:

Be it known that we, (inonen JACOBS and FERDINAND ZIGANEK, subjects of the Emperor of Germany, residing at Alliance, in the county of Stark and State of Ohio, haveinvented certain new and useful Improvements in Automatically-Oontrolled Valve Mechanism for UrasBurners; and we do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it pertains to make and use the same.

This invention relates to improvements in automatically-controlled valve mechanism for gas-burners.

This invention consists more especially in the combinatiomwith the gas-discharging portion of a gas-burner, a passage-way for feeding gas to a flame issuing from the aforesaid portion of the burner during the operation of the burner, a gas-suppl y passage-way for supplying gas to the first-mentioned passage-way, and a valve arranged to control communication between the two passage-ways, of a calorically-expansible medium exposed to and arranged to be influenced by the heat radiating or transmitted from the aforesaid flame, means acting to retain the valve in its closed position, means for holding the valve open, and means whereby the said valve-holding means is momentarily rendered inoperative by the contraction of the aforesaid expansible medium when the aforesaid flame becomes extinguished from any cause to accommodate the operation of the means acting to retain the valve in its closed position and automatically closing the valve during the short interval of time in which the aforesaid valveholding means is inoperative.

Another object is to provide a gas-burner provided with automatically closing valve mechanism which is simple and durable in construction and reliable in its operation.

\Vith these objects in view and to the end of realizing other advantages hereinafter appearing this invention consists in certain feaparts hereinafter described, and pointed out in the claims.

The application of our invention will be found invaluable wherever an interruption in the supply of gas passing to a gas-flame would be dangerous or ob;icctionable-as, for instance, where a gas-flame is liable to be extinguished without eflectually cutting off the supply of gas until again needed. It is obvious that if, for instance, the flame from a gasburner employed in heating or illuminating a living-room or dwelling were accidentally extinguished-as, for instance, by a temporary interruption of the supply of gas to the burncr and if this occurred during the night or at any time when the occupants of the dwelling were asleep and the flow of gas were reestablished without notice to the occupants and without therefore causing the burner to be relighted gas would escape from the burner into the dwelling. Suilocations within apartments lilled by gas escaping from gas-burners have occurred, and explosions have resulted from entering such apartments with a light.

The importance of the application of a safety appliance whereby the feed of gas to the gasburner is automatically interrupted upon the extinguishing of a flame issuing from the burner is therefore obvious.

In the accompanying drawings, Figure l is an enlarged side elevation, largely in central section, of a safety gas-burner embodying our invention. Fig. 2 is a transverse section on line 2 2, Fig. 1, looking downwardly. Fig. 3 1s a transverse section on line 3 3, Fig. 1, looking downwardly. Fig. 4t is a side elevation, largely in central section, of a portion of a burner and is illustrative of the operation of the calorically-expansib'le medium of the burner. Fig. 5 is a transverse section on line 5 5, Fig. 1, looking downwardly, except that in Fig. 5 the valve is shown in its closed position, whereas in Fig. 1 the valve is shown open.

Our improved safety gas-burner comprises tures of construction and combinations of l a metal casing A, which is preferably cylindrical and arranged vertically. The casing A is provided within its upper portion with a cylindrical chamber a. An upwardly-flaring bore 10, formed within the casing A, next below the chamber 10. connects at its upper end with the said chamber, which bore 10 is occupied by a correspondingly-tapering vertically-arranged plug-valve B. The surrounding wall of the bore 10 forms a seat, therefore, for the valve B.

The casing A is provided at one side of the bore 10 with a lateral gas-inlet 12, which connects at its inner end with the said bore and extends through an externally-screwthreaded pipe connection C, with which the said casing is provided.

The casing A is screw-threaded internally at its upper end, and a correspondingly externally screw-threaded ring D is screwed into the upper end of the said casing. The ring D is screw-threaded internally and screwed onto the upper end of a correspondingly externally screw-threaded metal receptacle G, which depends from the said ring into and is arranged centrally of the chamber a. The receptacle G is enough smaller transversely than the chamber (1. to avoid interruption in the continuity or extension of the said chamber wholly around the said receptacle.

The ring D is provided with holes (Z, ex tending vertically through the ring and suitably spaced circumferentially of the ring. The holes (Z constitute outlets for the chamber a.

In Fig. 1 the casing A is shown externally screw-threaded at its upper end, and a nozzle E, which is correspondingly screw-threaded internally at its lower end, is screwed onto the said casing and provided at its upper end With a perforated tip 0. \Ve would here remark that the nozzle E is employed if the burner is to be used as an illuminating-burner, but removed if the burner is to be used for heating purposes, and consequently during the operation of the burner a flame issues from the tip 0 of the nozzle E or from the holes (5 of the ringl), according as the burner is used for illuminating or heating purposes.

The valve B is provided with a port I), which has one end thereof arranged in the same plane horizontally with the discharging end of the gas-inlet 12. The port b has its opposite end terminating at the upper end and centrally of the valve B, and obviously the valve B is open, as shown in Fig. 1, or closed, as shown in Fig. 5, according as the plug B is turned to bring its port into or out of registry with the inlet 12, which constitutes a passage-way for supplying gas to the said port.

l/Ve would here remark that the port (I is continuously in communication with the chamber a, into which gas is conducted from the gas-supply passage-way 12 when the valve is open, and that the said chamber participates 1 in the formation of a passage-Way for feeding gas from the port 7) to the flame or flames issuing from the burner during the operation of the burner.

The bore 10 connects at its lower end with a chamber 13, which (see Fig. 1) is formed in the lower end of the casing A and extends to the lower extremity of the said casing. A coil-spring F is arranged within the chamber 13 and coiled around a stem 14, with which the valve B is provided. The stem 14 is arranged centrally and depends from the lower end of the valve B. The spring F is attached at one end to the stem 14 and at its opposite end to the casing A and acts to retain the valve B in its closed position. The stem 14 is provided at its lower end with a head H, which overlaps the lower end of the casing A and is provided with an upwardly-projecting annular flange 15 within the chamber 13. The head H is provided at its under side and centrally with a knob 7t, through the medium of which the stem 14 is turned against the action of the spring F to actuate the valve from its closed position (shown in Fig. 5) into its open position. (Shown in Fig. 1.) The valve B is normally closed, but is shown open in Fig. 1 and held open preparatory to and during the operation of the burner, as will hereinafter appear.

The valve Bis provided in its upper end with an annular cross-sectionally V-shaped recess 16, which extends around the discharging end of the port .7)that is, the two side walls of the recess 16 diverge upwardly and a pressure-exerting ring K has a lower annular cross-sectionally V-shaped portion 17 engaging the recess 16, with the upwardly-diverging circumferentially-extending surfaces of the said portion of the said ring arranged to frictionally engage the different walls, respectively, 0f the recess 16.

The receptacle G is somewhat enlarged transversely at its lower end, as at g, and a ring or annular member I is hung upon the said transversely-enlarged lower end of the said receptacle. The ring or member I depends below the receptacle (ur and is screwthreaded internally below the said receptacle, and a correspondingly externally screwthreaded cylindrical shell J is screwed into the ring 1 from below and abuts at its upper end against the lower end of the receptacle Gr. It will be observed, therefore, that the lower end of the receptacle G forms a stop firevjznting upward displacement of the mem- A spiral spring L is confined exteriorly of l and the upper end of the ring K. The ring 1, being attached to the shell J, is stationary so far as vertical displacement thereof is concerned, and the spring L exerts pressure downwardly upon the ring K and operates to the shell J between the lower end of the ring establish frictional engagement between the last-mentioned ring and the valve B.

The receptacle (Jr is a closed receptacle and is filled with any liquid or fluid m such, for instance, as mercuryreadily expansible or influenced by heat, and the lower head 20 of the said receptacle is preferably comparatively thin and bulged upwardly to accommodate a downward expansion of the bulged portion of the said head.

The ring K is provided internally with a slightly-beveled surface 71;, which slopes preferably outwardly and upwardly and is adapted to be frictionally engaged by the correspondingly-beveled edge of a disk or plate P, arranged within the said ring. The disk or plate P is provided centrally with an upwardlyprojecting vertically-arranged stem 22, which is attached to the said disk or plate in any approved manner and terminates at its upper end in a head 23, abutting against the under sideof the upwardly-bulged portion of the lower head 20 of the receptacle G. The

shell J is provided at its lower end with a head 24, and a spiral spring Q, which is considerably more powerful than the spring L, surrounds the stem 22 and is confined between the head 24: and the head 23 of the said stem. The spring Q acts in the direction to retain the head 23, and consequently the stem 22 and attached disk or plate P, in their upper position. The disk or plate P, head 24, and shell J are provided with any suitable number of perforations or holes 25 to accommodate the passage of the gas from the discharging end of the port 6 through the chamber a. The

disk or plate P is made, preferably, of sheet metal and in addition to its provision with holes or perforations 25 is provided with slots 26, which extend inwardly a suitable distance from the beveled edge of the disk or plate, as shown in Fig. 3. The holes 25 and the slots 26 in the disk or plate P render the said disk or plate less stiff than it would be if not provided with said slots and holes. It will be observed that the holes 25 in the disk or plate P, the holes 25 in the shell J and its head 24-, the chamber ('6, and the holes (Z in the ring D form a passage-way for conducting or feeding gas to the gas-discharging extremity of the burner and that the valve B controls communication between the said passage-way and the inlet or passage-way 12 employed in supplying gas, as hereinbefore described.

Means for preventing circumferential displacement of the pressure-exerting ring K is provided and consists, preferably, of a pin R, attached to the casing A and projecting into the space formed between two lugs 27, with which the ring K is provided, which lugs are shown in dotted lines in Fig. 3 and one of the said lugs being shown in Figs. 1 and 4.

The operation of our improved safety gasburner is as follows: The valve B is opened,

as shown in Fig. 1, against the action of the spring F. The tension of the spring L is sufficient to establish enough friction between the pressure-exerting ring K and the valve B to cause the said valve to remain in any position into which it is turned, notwithstanding the action of the spring F. The gas issuing from the tip a of the nozzle E, or from the holes or outlets (Z if the nozzle E is not employed, is ignited and the combustion of the gas results in heating the receptacle G and its contents. The mercury or fluid within the receptacle G being influenced by the heat expands, so as to result in a downward expansion of the upwardly-bulged lower head 20 of the said receptacle and in the exertion of pressure upon the head 23 of the stem 22 of the disk or plate P against the action of the spring Q until the beveled edge of the said disk or plate tightly frictionally engages the interiorly-beveled surface Z; of the pressureexerting ring K, and the capability of the said disk or plate to bulge downwardly accommodates a possibly excessive pressure exerted downwardly upon the said disk or plate.

We would here remark that the slope of the beveled surface 7 of the ring K and the corresponding slope of the edge of the disk or plate P are considerably less than the slope of the walls of the recess 16 and the corresponding slope of the circumferentially-extending surfaces of the lower portion 17 of the ring K, so that the establislunent of frictional engagement between the disk or plate P and the ring K does not materially, if at all, add to the pressure exerted downwardly upon the said ring by the spring L.

It will be readily observed that if the flame or flames issuing from the burner become extinguished from any causeas, for instance, by an interruption of the passage of gas to feed the said flame or flames-the receptacle and its contents G lower in temperature and the contraction of the expansible medium formed by the said receptacle and its contents results in rendering the disk or plate P free to be lifted by the pressure exerted by the spring Q against the under side of the head 23 of the stem 22 of the said disk or plate; but obviously the great friction established between the beveled edge of the said disk or plate and the internal surface it of the ring .K will during the lifting of the said disk or plate tend to and momentarily slightly lift the said ring within the recess 16 in the valve B, and thereby render the said valve free to be turned by the action of the spring F, which during the short interval of time that frictional engagement between the ring K and the valve B is interrupted automatically closes the valve, and thereby effectual] y interrupts the feed of gas to the gas-discharging portion of the burner.

What we claim is 1. The combination, with acasing provided with a chamber having a gas-outlet at one end and provided a suitable distance from the chamber with a gas-supply inlet or passageway; a valve-seat formed within the casing at the opposite end of the chamber, and a valve engaging the said seat and provided with a port extending through the valve, which port is in communication, at one end,with the aforesaid chamber in both positions of the valve and has its opposite end closed or in communication with the aforesaid gas-supply passageway according as the valve is closed or open,

of a member exerting pressure against the valve in the direction required to retain the valve seated; means acting to retain the valve in its closed position; a calorically-expansible medium arranged to be influenced by the heat from the combustion of gas at the aforesaid gas-outlet, and means whereby the aforesaid pressure-exerting member is loosened relative to the valve by the contraction of theexpansible medium after said medium has been expanded by the heat from the combustion of the gas.

2. The combination, with a casing provided with a chamber having a gas-outlet and a gassupply inlet or passage-way arranged a suitable distance apart, a valve-seat formed within the casing, and a valve engaging the said seat and provided with a port extending through the valve, which port is in communication at one end with the aforesaid chamber in both positions of the valve and has its opposite end closed or in communication with the aforesaid gas-supply passage-way according as the valve is closed or open, of a member exerting pressure against the valve in the direction required to retain the valve seated, means acting to retain the valve in its closed position, means for preventing circumferential displacement of the said pressure-exerting member, acalorically-expansible medium arranged to be influenced by the heat from the combustion of gas at the aforesaid gas-outlet, and means whereby the aforesaid pressure-exerting member is loosened relative to the valve by the contraction of the expansible medium after said medium has been expanded by the heat from the combustion of the gas.

3. The combination, with a casing provided with a chamber having a gas-outlet and a gassupply inlet or passage-way arranged a suitable distance apart, a valve-seat formed within the casing, a valve engaging the said seat and provided with a port extending through the valve, which port is in communication at one end with the aforesaid chamber in both positions of the valve and has its opposite end closed or in communication with the aforesaid gas-supply passage-way according as the valve is closed or open, of a member exerting pressure against the valve in the direction required to retain the valve seated, means acting to retain the valve in its closed position, a spring acting to retain the aforesaid pressure-exert ing member in its operative position, a calorically-expansible medium arranged to be in fluenced by the heat from the combustion of gas at the aforesaid gas-outlet, and means whereby the aforesaid pressure-exerting member is loosened relative to the valve and against the action of the aforesaid spring by the contraction of the expansible medium after said medium has been expanded by the heat from the combustion of the gas.

4. The combination, With a casing provided with a chamber having a gas-outlet and a gassupply inletor passage-way arranged a suitable distance apart; a flaring valve-seat formed within the casing, and a tapering plug-valve engaging the said seat and provided with a port extending through the valve, which port is in communication at one end with the aforesaid chamber in both positions of the valve and has its opposite end closed or in communication with the aforesaid gas-supply passage-way according as the valve is closed or open, which valve is provided in its larger end with an annular cross-sectionall y V-shaped recess, of a pressure-exerting ring having an annular cross-sectionally V-shaped portion engaging the said recess and provided internally with a slight bevel, means acting to retain the valve in its closed position, means acting to retain the said ring in its pressure-exerting position, a calorically-expansible medium arranged to be influenced by the heat from the combustion of gas at the aforesaid gas-outlet, and means whereby the aforesaid ring is loosened relative to the valve by the contraction of the expansible medium after said medium has been expanded by the heat from the combustion of the gas.

5. The combination, with a gas-burner comprising an upright casing provided at its upper portion with a chamber having a gas-outlet at its upper end and provided a suitable distance below the said chamber with a gas-supplyinlet or passage-way, a valve-seat formed within the casing at the lower end of the said chamber, and a valve engaging the said seat and provided with a port extending through the valve, which port is in communication at one end with the aforesaid chamber in both positions of the valve and has its opposite end closed or in communication with the aforesaid gas-supply passage-way according as the valve is closed or open, a pressure-exerting member acting downwardly upon the valve, means acting to retain the valve in its closed position, means exerting pressure downwardly upon the pressure-exerting member, a caloricallyexpansible medium arranged to be influenced by the heat from the combustion of gas at the aforesaid outlet, and means whereby the aforesaid pressure-exerting member is loosened relative to the valve by the contraction of the expansible medium after the said medium has been expanded by the heat from the combustion of gas.

6. The combination, with an upright casing provided in its upper portion with a chamber having a gas-outlet at its upper end and provided a suitable distance below the said chamber with a gas-supply inlet or passageway, an upwardly-flaring valve-seat formed within the casing at the lower end of the said chamber, and a downwardly-tapering plugvalve engaging the said seat and provided with a port extending through the valve, which port is in communication at one end with the aforesaid chamber in both positions of the valve and has its opposite end closed or in communication with the aforesaid gas-supply passage-way according as the valve is closed or open, of a pressure-exerting member acting downwardly upon the valve; means acting to retain the valve in its closed position; means exerting pressure downwardly upon the pre, sure-exerting member; a calorically-expansible medium arranged to be influenced by the heat from the combustion of gas at the aforesaid outlet, and means whereby the aforesaid pressure-exerting member is loosened relative to the valve by the contraction of the expansible medium after the said medium has been expanded by the heat from the combustion of the gas.

' 7 The combination, with a casing provided with a chamber liavinga gas-outlet at its upper end and provided a suitable distance below the said chamber with a gas supply inlet or passage way; an upwardly flaring valve seat formed within the casing at the lower end of the said chamber, and a valve engaging the said seat and provided with a port extending through the valve, which port is in communication at one end with the aforesaid chanr ber in both positions of the valve and has its opposite end closed or in communication with the aforesaid gas-supply passage-way accord ing as the valve is closed or open, of a pressure-exerting ring arranged over and acting downwardly upon the valve and provided internally with a slight bevel; means acting to retain the valve in its closed position; means exerting pressure downwardly upon the pressure-exerting ring; a depressible disk or plate having a beveled edge arranged to engage the aforesaid internal bevel of the pressure-exerting ring, said disk or plate having an upwardly-projecting centrally-located stem pro vidcd at its upper end with a head; means acting to hold the said disk or plate in its upper and normal position, a calorically-expansible medium arranged to be influenced to exert pressure downwardly upon the aforesaid head by the heat from the combustion of gas at the aforesaid outlet.

8. The combination, with acasing provided with a chamber having a gas-outlet at its upper end and provided a suitable distance below the said chamber with a gas supply inlet or passage-way; an upwardly flaring valve seat formed within the casing at the lower end of the said chamber, and a downwai'dly-tapering valve engaging the said seat and provided with a port extending through the valve, which port is in communication at one end with the aforesaid chamber in both positions of the valve and has its opposite end closed or in communication with the aforesaid gas-supply passage-way according as the valve is closed or open; a pressure-exerting ring arranged over and acting downwardly upon the valve and provided internally with a bevel; means acting to retain the valve in its closed position; means exerting pressure downwardly upon the pressure-exerting ring; a depressible slotted disk or plate having a beveled edge arranged to engage the aforesaid internal bevel of the pressure-exerting ring, said disk or plate having an upwardly-projecting centrally-located stem provided at its upper end with a head; means acting to hold the said disk or plate in its upper and normal position, and a calorically-expansible medium arranged to be influenced to exert pressure downwardly upon the aforesaid head by the heat from the combustion of gas at the aforesaid outlet.

9. The combination, with a casing provided with a chamber having a gas-outlet at one end and provided a suitable distance from the chamber with a gas-Suppl y inlet or passageway; a flaring valve-seat formed within the casing at the opposite end of the chamber, and a tapering plug-valve engaging the said seat and provided with a port extending through the valve, which port is in communication, at one end, with the aforesaid chamber in both positions of the valve and has its opposite end closed or in communication with the aforesaid gas-supply passage-way according as the valve is closed or open, of a member exerting pressure against the larger end of thevalve, means acting to retain the valve in its closed position; a calorically-expansible medium arranged to be influenced by the heat from the combustion of gas at the aforesaid gas-outlet, and means whereby the aforesaid pressure-exerting member is loosened relative to the valve by the contraction of the expansible medium after said medium has been expanded by the heat from the combustion of the gas.

10. The combination, with a casing provided with a chamber having a gas-outlet at one end and provided a suitable distance from the said chamber with a gassupply inlet or passageway, a flaring valve-seat formed within the casing at the opposite end of the said chamber, and a tapering plug-valve engaging the said seat and provided with a port extending through the valve, which port is in communication at one end with the aforesaid chamber in both positions of the valve and has its opposite end closed or in communication with the aforesaid gas-supply passage-way according as the valve is closed or open, of a member exerting pressure against the larger end of the valve, means acting to retain the valve 1n its closed position, means for preventing circumferential displacement of the said pressure-exerting member, a caloricallyexpansible medium arranged to be influenced by the heat from the combustion of gas at the aforesaid gas-outlet, and means whereby the aforesaid pressure-exerting member is loosened relative to the valve by the contraction of the expansible medium after said medium has been expanded by the heat from the combustion of the gas.

11. The combination, with a casing provided with a chamber having a gas-outlet at one end and provided a suitable distance from the said chamber with a gas-supply inlet or passageway, a flaring valve-seat formed within the casing at the opposite end of the said chamber, and a tapering plug-valve engaging the said seat and provided with a port extending through the valve, which port is in communication at one end with the aforesaid chamber in both positions of the valve and has its opposite end closed or in communication with the aforesaid gas-supply passage-way according as the valve is closed or open, of a ring exerting pressure against the larger end of the valve, means acting to retain the valve in its closed position, a spring acting to retain the aforesaid ring in its pressure-exerting position, a calorically-expansiblc medium arranged to be influenced by the heat from the combustion of gas at the aforesaid gas-outlet, and means whereby the aforesaid ring is loosened relative to the valve and against the action of the aforesaid spring by the contraction of the expansible medium after said medium has been expanded by the heat from the combustion of the gas.

12. The combination, with a casing provided with a chamber having a gas-outlet at one end and provided a suitable distance from the said chamber with a gas-supply inlet or passageway; a flaring valve-seat formed within the casing at the opposite end of the said chamber, and a tapering plug-valve engaging the said seat and provided with a port extending through the valve, which port is in communication at one end with the aforesaid chamber in both positions of the valve and has its opposite end closed or in communication with the aforesaid gas-supp] y passage-way according as the valve is closed or open, which valve is provided in its larger end with an annular cross-seetionally V-shaped recess, of a pressure-exerting ring having an annular crosssectionally V-shaped portion engaging the said recess and provided internally with a slight bevel, means acting to retain the valve in its closed position, means acting to retain the said ring in its pressure-exerting position, a ealorically-expansible medium arranged to be influenced by the heat from the combustion of gas at the aforesaid gas-outlet, and means whereby the aforesaid ring is loosened relative to the valve by the contraction of the expansible medium after said medium has been expanded by the heat from the combustion of the gas.

13. The combination, with an upright casing provided at its upper portion with achamber having a gas-outlet at its upper end and provided a suitable distance below the said chamber with a gas-supply inlet or passageway, an upwardly-flaring valve-seat formed within the casing at the lower end of the said chamber, and a downwardly-tapering plugvalve engaging the said seat and provided with a port extending through the valve, which port is in communication at one end with the aforesaid chamber in both positions of the valve and has its opposite end closed or in communication with the aforesaid gas-supply passage-way according as the valve is closed or open, of a pressure-exerting ring acting downwardly upon the valve and provided internally with an annular beveled surface. means acting to retain the valve in its closed position, means exerting pressure downwardly upon the pressure-exerting ring, a depressible disk or plate having a beveled edge arranged to frictionally engage the aforesaid internal beveled surface of the pressure-exerting ring, means acting to hold the said disk or platein its upper and normal position, a caloricallyexpansible medium arranged to be influenced by the heat from the combustion of gas at the aforesaid outlet, and means whereby the aforesaid disk or plate is depressed by the expansion of the said expansible medium to establish frictional engagement between the said disk or plate and the aforesaid ring.

14. The combination, with an upright casing provided in its upper portion with a chamber having a gas-outlet at its upper end and.

provided a suitable distance below the said chamber with a gas-supply inlet or passageway, an upwardly-flaring valve-seat formed within the casing at the lower end of the said chamber, and a downwardly-tapering plugvalve engaging the said seat and provided with a port extending through the valve, which port is in communication at one end with the aforesaid chamber in both positions of the valve and has its opposite end closed or in communication with the aforesaid gas-supply passage-way according as the, valve is closed or open, of a pressure-exerting ring acting downwardly upon the valve and provided with an annular beveled surface; means acting to retain the valve in its closed position; means exerting pressure downwardly upon the pres sure-exerting ring; a depressible disk or plate having an annular beveled surface arranged meme W to frictionally engage the aforesaid beveled which receptacle is filled with a caloricallysurface of the pressure-exerting ring, said expansible fluid. disk or plate having an upwardly-projecting Signed by us at Alliance, Ohio, this 9th day cenltrally-locslitedc1 stem provided at its lppgr of November, 1904. 5 enc With a iea means acting,' to 10 t e 1 1 a 1 said disk or plate in its upper and normal 130- sition, and a receptacle arranged Within and J i J 1' centrally of the aforesaid chamber and pro- Witnesses: vided With a lower upwardly-bulged metal P. D. HOWELL, IO head engaging the head of the aforesaid stem, JAMES Gr. HAGUE. 

